Refer to the Figure

Refer to the figure.
In the figure, identify the following groups: protostomes, deuterostomes, arrow worms, calcareous sponges, chordates, cnidarians, ctenophores, demosponges, ecdysozoans, echinoderms, glass sponges, hemichordates, lophotrochozoans, and placozoans.Additionally, identify these distinguishing traits marked with dots on the phylogenetic tree: bilateral symmetry along an anterior-posterior axis, three embryonic cell layers, centralized nervous system; blasotopore develops into mouth; blastopore develops into anus; choanocytes and spicules; exoskeleton molting; notochord; radial symmetry, silicaceous spicules; unique cell junctions, collagen and proteoglycans in extracellular matrix; nerve nets (listed twice); distinct organ systems.